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                                <h1 id="&#x5173;&#x4E8E;&#x7ED9;javascript&#x5BF9;&#x8C61;&#x6DFB;&#x52A0;&#x3001;&#x5220;&#x9664;&#x3001;&#x4FEE;&#x6539;&#x5BF9;&#x8C61;&#x7684;&#x5C5E;&#x6027;"><a href="https://www.cnblogs.com/goweb/p/5357640.html" target="_blank">&#x5173;&#x4E8E;&#x7ED9;javascript&#x5BF9;&#x8C61;&#x6DFB;&#x52A0;&#x3001;&#x5220;&#x9664;&#x3001;&#x4FEE;&#x6539;&#x5BF9;&#x8C61;&#x7684;&#x5C5E;&#x6027;</a></h1>
<h2 id="&#x4EE5;&#x4E0B;&#x662F;&#x81EA;&#x5DF1;&#x603B;&#x7ED3;&#x7684;&#x51E0;&#x79CD;&#x65B9;&#x6CD5;">&#x4EE5;&#x4E0B;&#x662F;&#x81EA;&#x5DF1;&#x603B;&#x7ED3;&#x7684;&#x51E0;&#x79CD;&#x65B9;&#x6CD5;</h2>
<ul>
<li><h3 id="&#x5229;&#x7528;&#x52A8;&#x6001;&#x7279;&#x6027;">&#x5229;&#x7528;&#x52A8;&#x6001;&#x7279;&#x6027;</h3>
</li>
</ul>
<p><a href="javascript:void(0" target="_blank"><img src="https://common.cnblogs.com/images/copycode.gif" alt="&#x590D;&#x5236;&#x4EE3;&#x7801;"></a>;)</p>
<pre><code> 1             function Person(){};
 2             var person = new Person();
 3             person.name = &apos;yy&apos;;
 4             person.gender = &apos;girl&apos;;
 5             console.log(person.name+&apos;,&apos;+person.gender);//yy,girl
 6             delete person.name;//&#x5220;&#x9664;&#x5C5E;&#x6027;
 7             console.log(person.name);//undefined
 8 //            &#x53D8;&#x5F0F;
 9             function Person(){};
10             var person = new Person();
11             person[&apos;name&apos;] = &apos;yy&apos;;
12             person[&apos;gender&apos;] = &apos;girl&apos;;
13             console.log(person.name+&apos;,&apos;+person.gender);//yy,girl
14             delete person.name;//&#x5220;&#x9664;&#x5C5E;&#x6027;
15             console.log(person.name);//undefined
</code></pre><p><a href="javascript:void(0" target="_blank"><img src="https://common.cnblogs.com/images/copycode.gif" alt="&#x590D;&#x5236;&#x4EE3;&#x7801;"></a>;)</p>
<ul>
<li><h3 id="&#x6784;&#x9020;&#x51FD;&#x6570;&#x4E2D;this">&#x6784;&#x9020;&#x51FD;&#x6570;&#x4E2D;this</h3>
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<p><a href="javascript:void(0" target="_blank"><img src="https://common.cnblogs.com/images/copycode.gif" alt="&#x590D;&#x5236;&#x4EE3;&#x7801;"></a>;)</p>
<pre><code>var Person = function (){
                this.name = &apos;yy&apos;;
                this.gender = &apos;girl&apos;
            };
            var person = new Person();
            console.log(person.name+&apos;,&apos;+person.gender);//yy,girl
</code></pre><p><a href="javascript:void(0" target="_blank"><img src="https://common.cnblogs.com/images/copycode.gif" alt="&#x590D;&#x5236;&#x4EE3;&#x7801;"></a>;)</p>
<ul>
<li><h3 id="&#x539F;&#x578B;&#x4E2D;&#x6DFB;&#x52A0;&#x5C5E;&#x6027;">&#x539F;&#x578B;&#x4E2D;&#x6DFB;&#x52A0;&#x5C5E;&#x6027;</h3>
</li>
</ul>
<p><a href="javascript:void(0" target="_blank"><img src="https://common.cnblogs.com/images/copycode.gif" alt="&#x590D;&#x5236;&#x4EE3;&#x7801;"></a>;)</p>
<pre><code>var Person = function (){    
            };
            Person.prototype.name = &apos;yy&apos;;
            Person.prototype.gender = &apos;girl&apos;;
            var person = new Person();
            console.log(person.name+&apos;,&apos;+person.gender);//yy,girl
            console.log(person[&apos;name&apos;]+&apos;,&apos;+person[&apos;gender&apos;]);//yy,girl
</code></pre><p><a href="javascript:void(0" target="_blank"><img src="https://common.cnblogs.com/images/copycode.gif" alt="&#x590D;&#x5236;&#x4EE3;&#x7801;"></a>;)</p>
<ul>
<li><h3 id="&#x5B57;&#x9762;&#x91CF;&#x6DFB;&#x52A0;&#x5C5E;&#x6027;">&#x5B57;&#x9762;&#x91CF;&#x6DFB;&#x52A0;&#x5C5E;&#x6027;</h3>
</li>
</ul>
<p><a href="javascript:void(0" target="_blank"><img src="https://common.cnblogs.com/images/copycode.gif" alt="&#x590D;&#x5236;&#x4EE3;&#x7801;"></a>;)</p>
<pre><code>var person = {    
            };
            person.name = &apos;yy&apos;;
            person.gender = &apos;girl&apos;;
            console.log(person.name+&apos;,&apos;+person.gender);//yy,girl
            console.log(person[&apos;name&apos;]+&apos;,&apos;+person[&apos;gender&apos;]);//yy,girl
//            &#x53E6;&#x4E00;&#x79CD;&#x5199;&#x6CD5;
            var person = {
                name: &apos;yy&apos;,
                gender: &apos;girl&apos;
            };
            console.log(person.name+&apos;,&apos;+person.gender);//yy,girl
            console.log(person[&apos;name&apos;]+&apos;,&apos;+person[&apos;gender&apos;]);//yy,girl
</code></pre><p><a href="javascript:void(0" target="_blank"><img src="https://common.cnblogs.com/images/copycode.gif" alt="&#x590D;&#x5236;&#x4EE3;&#x7801;"></a>;)</p>
<ul>
<li><h3 id="&#x5C01;&#x88C5;extend&#x65B9;&#x6CD5;">&#x5C01;&#x88C5;extend&#x65B9;&#x6CD5;</h3>
</li>
</ul>
<p><a href="javascript:void(0" target="_blank"><img src="https://common.cnblogs.com/images/copycode.gif" alt="&#x590D;&#x5236;&#x4EE3;&#x7801;"></a>;)</p>
<pre><code>var p1 = {};
            var p2 = {name:&apos;yy&apos;,gender:&apos;girl&apos;};
            p1.extend = function(obj){
                for(var k in obj){
                    this[k] = obj[k];
                }
            }
            p1.extend(p2);
            console.log(p1.name+&apos;,&apos;+p1.gender);//yy,girl
            console.log(p1[&apos;name&apos;]+&apos;,&apos;+p1[&apos;gender&apos;]);//yy,girl
</code></pre><p><a href="javascript:void(0" target="_blank"><img src="https://common.cnblogs.com/images/copycode.gif" alt="&#x590D;&#x5236;&#x4EE3;&#x7801;"></a>;)</p>
<ul>
<li><h3 id="&#x5728;&#x6B64;&#x5217;&#x4E3E;&#x4E86;&#x51E0;&#x79CD;&#x5BF9;&#x8C61;&#x6DFB;&#x52A0;&#x5C5E;&#x6027;&#x7684;&#x65B9;&#x6CD5;&#xFF0C;&#x90A3;&#x4E48;&#x5BF9;&#x8C61;&#x6DFB;&#x52A0;&#x65B9;&#x6CD5;&#x4E5F;&#x5C31;&#x7167;&#x732B;&#x753B;&#x864E;&#x4E86;">&#x5728;&#x6B64;&#x5217;&#x4E3E;&#x4E86;&#x51E0;&#x79CD;&#x5BF9;&#x8C61;&#x6DFB;&#x52A0;&#x5C5E;&#x6027;&#x7684;&#x65B9;&#x6CD5;&#xFF0C;&#x90A3;&#x4E48;&#x5BF9;&#x8C61;&#x6DFB;&#x52A0;&#x65B9;&#x6CD5;&#x4E5F;&#x5C31;&#x7167;&#x732B;&#x753B;&#x864E;&#x4E86;</h3>
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<h3 id="&#x672C;&#x6587;&#x8F83;&#x77ED;&#xFF0C;&#x5982;&#x679C;&#x6709;&#x4EC0;&#x4E48;&#x5EFA;&#x8BAE;&#xFF0C;&#x591A;&#x591A;&#x4EA4;&#x6D41;&#xFF0C;&#x539F;&#x521B;&#x6587;&#x7AE0;&#xFF0C;&#x6587;&#x7B14;&#x6709;&#x9650;&#xFF0C;&#x624D;&#x758F;&#x5B66;&#x6D45;&#xFF0C;&#x6587;&#x4E2D;&#x82E5;&#x6709;&#x4E0D;&#x6B63;&#x4E4B;&#x5904;&#xFF0C;&#x4E07;&#x671B;&#x544A;&#x77E5;&#xFF0C;&#x4E0D;&#x80DC;&#x611F;&#x6FC0;&#xFF01;">&#x672C;&#x6587;&#x8F83;&#x77ED;&#xFF0C;&#x5982;&#x679C;&#x6709;&#x4EC0;&#x4E48;&#x5EFA;&#x8BAE;&#xFF0C;&#x591A;&#x591A;&#x4EA4;&#x6D41;&#xFF0C;&#x539F;&#x521B;&#x6587;&#x7AE0;&#xFF0C;&#x6587;&#x7B14;&#x6709;&#x9650;&#xFF0C;&#x624D;&#x758F;&#x5B66;&#x6D45;&#xFF0C;&#x6587;&#x4E2D;&#x82E5;&#x6709;&#x4E0D;&#x6B63;&#x4E4B;&#x5904;&#xFF0C;&#x4E07;&#x671B;&#x544A;&#x77E5;&#xFF0C;&#x4E0D;&#x80DC;&#x611F;&#x6FC0;&#xFF01;</h3>

                                
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